1-22
/etc/udev
Configuration of udev devices is done by working with files in which directory
Runlevel 1
During the initialization process for a Linux system using SysV init, which runlevel corresponds to single-user mode?
/var/log/dmesg
If the kernel ring buffer had been overwritten, within which file can you look to find boot messages?
/etc/init.d (sometimes linked from /etc/rc.d/init.d as well)
On a system using SysV init, in which directory are the startup and shutdown scripts for services stored?
/proc/interrupts
What command enables you to view the current interrupt request (IRQ) assignments
udevadm
What command is used to view kernel-related udev events in real time
Check to ensure that the disk is deteceted in the basic input/output system (BIOS)
What is a good first troubleshooting step when a hard disk is not detected by the Linux kernel?
telinit
When using SYSV init-based systems, which command would you use if you make changes to the /etc/inittab file and want those changes to be reloaded without a reboot?
info
When working with hotplug devices, you need to gather more information about them through udevadm. Which udevadm command enables you to query the udev database for information on a device?
systemctl status
Which command and option can be used to determine whether given service is currently loaded?
lsmod
Which command can be used to obtain a list of currently loaded kernel modules
init (runlevel 6)
Which command can be used to reboot a system
dmesg
Which command can be used to view the kernel ring buffer in order to troubleshoot the boot process
wall
Which command can you use to send a message to all users who are currently logged into a system?
runlevel
Which command displays the current runlevel for a system?
modprobe
Which command is used to automatically load a module and its dependencies?
lsusb
Which command is used to obtain a list of USB devices?
systemctl list-units
Which command is used with systemd in order to list the available service units?
-nn
Which option to lspci is used to display both numeric codes and device names?
--show-depends
Which option to the modprobe command shows the dependencies for a given module
/sys/bus/usb/devices
Within which directory is information about USB devices stored?
/lib/systemd/system
Within which folder are systemd unit configuration files stored?